//**************************************************************
// jQZoom allows you to realize a small magnifier window,close
// to the image or images on your web page easily.
//
// jqZoom version 2.1
// Author Doc. Ing. Renzi Marco(www.mind-projects.it)
// First Release on Dec 05 2007
// i'm searching for a job,pick me up!!!
// mail: renzi.mrc@gmail.com
//**************************************************************

(function($){
	$.fn.jqueryzoom = function(options){
	var settings = {
		xzoom: 200,//zoomed width default width
		yzoom: 200,//zoomed div default width
		offset: 10,	//zoomed div default offset
		position: "right",//zoomed div default position,offset position is to the right of the image
		lens:1, //zooming lens over the image,by default is 1;
		preload: 1
	};
	if(options) {
		$.extend(settings, options);
	}
	var noalt='';
	$(this).hover(function(){
	    var imageLeft = this.offsetLeft;
	    var imageRight = this.offsetRight;
	    var imageTop =  $(this).get(0).offsetTop;
	    var imageWidth = $(this).children('img').get(0).offsetWidth;
	    var imageHeight = $(this).children('img').get(0).offsetHeight;
        noalt= $(this).children("img").attr("alt");
	    var bigimage = $(this).children("img").attr("jqimg");
        $(this).children("img").attr("alt",'');

	    if($("div.zoomdiv").get().length == 0){
		    $(this).after("<div class='zoomdiv'><img class='bigimg' src='"+bigimage+"'/></div>");
		    $(this).append("<div class='jqZoomPup'>&nbsp;</div>");
	    }

	    if(settings.position == "right"){
            if(imageLeft + imageWidth + settings.offset + settings.xzoom > screen.width){
            	leftpos = imageLeft  - settings.offset - settings.xzoom;
            }else{
            	leftpos = imageLeft + imageWidth + settings.offset;
            }
	    }else{
	    	leftpos = imageLeft - settings.xzoom - settings.offset;
		    if(leftpos < 0){
		    	leftpos = imageLeft + imageWidth  + settings.offset;
		    }
	    }

	    $("div.zoomdiv").css({ top: imageTop,left: leftpos });
	    $("div.zoomdiv").width(settings.xzoom);
	    $("div.zoomdiv").height(settings.yzoom);
        $("div.zoomdiv").show();
        if(!settings.lens){
          $(this).css('cursor','crosshair');
		}
	   $(document.body).mousemove(function(e){
		   mouse = new MouseEvent(e);
           /*$("div.jqZoomPup").hide();*/
		   var bigwidth = $(".bigimg").get(0).offsetWidth;
		   var bigheight = $(".bigimg").get(0).offsetHeight;
		   var scaley ='x';
		   var scalex= 'y';
		   if(isNaN(scalex)|isNaN(scaley)){
			   var scalex = (bigwidth/imageWidth);
			   var scaley = (bigheight/imageHeight);
			   $("div.jqZoomPup").width((settings.xzoom)/scalex );
			   $("div.jqZoomPup").height((settings.yzoom)/scaley);
	           if(settings.lens){
	            	$("div.jqZoomPup").css('visibility','visible');
	           }
		   }

           xpos = mouse.x - $("div.jqZoomPup").width()/2 - imageLeft;
           ypos = mouse.y - $("div.jqZoomPup").height()/2 - imageTop ;
           if(settings.lens){
	           xpos = (mouse.x - $("div.jqZoomPup").width()/2 < imageLeft ) ? 0 : (mouse.x + $("div.jqZoomPup").width()/2 > imageWidth + imageLeft ) ?  (imageWidth -$("div.jqZoomPup").width() -2)  : xpos;
	           ypos = (mouse.y - $("div.jqZoomPup").height()/2 < imageTop ) ? 0 : (mouse.y + $("div.jqZoomPup").height()/2  > imageHeight + imageTop ) ?  (imageHeight - $("div.jqZoomPup").height() -2 ) : ypos;
           }

           if(settings.lens){
        	   $("div.jqZoomPup").css({ top: ypos,left: xpos });
           }

			scrolly = ypos;
			$("div.zoomdiv").get(0).scrollTop = scrolly * scaley;
			scrollx = xpos;
			$("div.zoomdiv").get(0).scrollLeft = (scrollx) * scalex ;
	    });
		},function(){
           $(this).children("img").attr("alt",noalt);
	       $(document.body).unbind("mousemove");
	       if(settings.lens){
	       $("div.jqZoomPup").remove();
	       }
	       $("div.zoomdiv").remove();

	    });

        count = 0;
		if(settings.preload){
			$('body').append("<div style='display:none;' class='jqPreload"+count+"'>sdsdssdsd</div>");
			$(this).each(function(){
		        var imagetopreload= $(this).children("img").attr("jqimg");
		        var content = jQuery('div.jqPreload'+count+'').html();
		        jQuery('div.jqPreload'+count+'').html(content+'<img src=\"'+imagetopreload+'\">');
			});
		}
	}
})(jQuery);

function MouseEvent(e) {
	this.x = e.pageX
	this.y = e.pageY
}


